6 to 8 hrs for digestion. it stays in the stomach for 2 hours and then in the intestine for another 2 hours. the undigested food goes to the large intestine and the digested food goes to whole body through blood. Carbhydrates and proteins about 1 1/2 -2 hrs. Fats 2 hrs.
And based on that a foetus does not posses self-awareness. Human babies have been found to become self aware between the ages of 18-24 months. The rouge test is a self-recognition test that identifies a human child's ability to recognize a reflection in a mirror as his or her own.
Self-conscious emotions do not emerge until basic elements of self-awareness have developed, usually between 18 and 24 months of age. The family of self-conscious emotions typically includes guilt, shame, embarrassment, and pride. These emotions arise when a social expectation has been violated (in the case of guilt, shame, and embarrassment) or attained (in the case of pride).